Is the Swiss Pass right for us?

Same map I posted on an earlier thread. shows what is included, 50% and 25%.
https://www.swiss-pass.ch/wp-content/uploads/pdf/swiss-travel-system-map.pdf

A Swiss Travel Pass generally includes travel only to inhabited villages. Since you are traveling by car to most of these, I doubt that a Swiss Travel Pass will be a wise investment. You will not be able to get the car to Wengen, Muerren, or Zermatt, but you can get to a parking lot nearby (they are not free) and take a train or cable car the rest of the way.

You might look at a Berner Oberland Pass.

If you have the patience to plan every where you want to go, a 30-day Half Fare Card might save you a few CHF. They are 120 CHF per person and everything is half price, even trips like to the Jungfraujoch that are only covered at 25% by the STP.

The break-even point is 240 CHF of full fare tickets per person, anything more and the HFC saves money.

Price out each trip at www.sbb.ch/en, keeping in mind that the first price you see assumes you have the Half Fare Card, so double that to get the true full fare ticket price.

The Fr. 120.- half-fare card almost pays for itself if you go up to Jungfraujoch. Throw in, say, Gornergrat in Zermatt, Rigi or Pilatus in Luzern, and the savings become significant.
The Swiss Pass is far more expensive, gives less discounts on some mountain railways, and is most probably not worth it if you have a car.

May I ask why you have a car, by the way? It makes sense to me if you have a very good rental deal, if some of your party have mobility issues, or if you are able to fill it with 3-4 passengers, but otherwise I don't find Switzerland to be particularly car-friendly, especially since you are not planning to go much off the beaten path.

So the half fare card offers 50% discount for Jungfrau?? Well heck, that would practically pay for itself right there! I thought it only offered 25% discount for it. If we're doing that combined with the required trains/lifts for places like Zermatt and Harder Kulm, it would indeed be beneficial.

And about the car rental - we had a car rental last time we visited Switzerland and the only annoyance we found was the cost of parking. But the reason we prefer a car rental is simply freedom to do what we want, when we want, without having to wait or worry about catching public transport and lugging our baggage on each. We can stop whenever I see a gorgeous view (all the time) for a photo, we don't have to have a plan for the day, we don't have to worry about being on public transport everywhere we go being surrounded by hundreds of other people and needing to wear our mask the entire time...
Mainly we just like to have the flexibility without being on anyone else's schedule, but during the current concerns I think it's best to be traveling around a country alone in a car vs public transit whenever possible. The views are beautiful on a train, but we love the traveling by car. (I know that's very non-European)

Thank you for the information on the half fare card! I did not realize it covered Jungfrau, which is a HUGE discount. That does sound much more ideal for us! Thank you!!!

So the half fare card offers 50% discount for Jungfrau?? Well heck,
that would practically pay for itself right there! I thought it only
offered 25% discount for it.

You might be thinking of the Swiss Travel Pass, which only gives a 25% discount for Jungfrau.

Have a great trip!!