We all have different things we're willing to splurge on, Sammy. I don't think it's fair to do no more than criticize someone who comes along looking for suggestions. I'd say let courshel decide for themselves what is a worthwhile expense.
As an impartial observer, let me just throw out there that PSG is one of the most famous football clubs in the world, with a truly global following. PSG also has some of the most famous, talented players on their team - Messi, Neymar, Mbappe, Ramos. The opportunity to see Messi play live would be worth plenty in and of itself. It's like a lifelong basketball fan getting to see Michael Jordan play (made all the more special by the fact that those of us in the US don't get to see people like Messi play club matches easily, so finding yourself traveling abroad when the opportunity presents itself could be something some folks might not want to pass up). Further still, the match the OP is asking about isn't just any match but the final match of the season - the very last fixture of the 2021-22 season, after which rosters will change and players will change.
But aaaaanyways, sound like those particular seats come with all the VIP treatment! I know most all the PSG matches (and all the Ligue 1) matches more than a few weeks out pretty much have that "TBD" disclaimer because exact times are subject to change, but there's a reasonably good chance the match will happen on that date and at that time. They just have to say that TBD because it's not officially set in stone yet. That's the last weekend of the season though and May 21 has pretty much been pegged as the final date for awhile.
Have a great time, if you go! Very exciting!