If trophies are what is giving you motivation to keep playing a game you should've dropped the game already.
Why do they want you to keep you engaged longer, what do they want to waste your time? Ultimately it comes down to money, so it's much better when the system is upfront about that. Give a discount for people that buy more games, problem solved, no need for more nonsense.
How about instead of asking you to log once a month they release a banger that will make you want to long on anyway? This sort of mentality is exactly how Blizzard ruined WoW, treating their players like hamsters.
I mean theres an endless ocean of games to play. Stay on your ps5 longer, download some and enjoy your time.