Paris Pass - no , not worth it
Museum Pass- yes, can be worth it..
They are two different things so you must be clear on which you mean.
The MP does let you skip lines in most places( notable exception is the Tower of Notre Dame,, pass is accepted for admission but no line skipping, go first thing before it opens!) .. and is useful for places like Orsay, Louvre, and Versailles.. it is also good because you can pop in to a few museums you may be on the fence about spending full admission on.. plus its useful for bathroom break pop ins( museum bathrooms are clean ( usually) and free. )
Paris pass is not a pass,, but a collection of vouchers.. most of which you won't have time to get the use of .. and the price is considerably higher then Museum pass and just buying some of the other stuff separately. For a 4 day visit you can usually get away with buying just a carnet of tickets for metro/ buses.( ten one way tickets) .. its 13.70.. so even if you get two( you can share tickets) its still a good deal.. and a cruise ( included on the Paris Pass) is only 11-14 euros anyways..
A frantically busy person may be able to justify the Paris Pass.. but only barely, personally I would never recommend it myself.
As said.. the pass does let you skip ticket lines .. but security lines are never skippable .