It makes sense that the bookmakers favor PSG as the winner with lower odds than Inter Milan. It's all based on many betting on PSG and the bettors have a reason to bet on PSG winning because of the high consistency in several competitions. While Inter Milan has failures in some competitions that provide negative value. On the one hand, bettors believe that PSG is chasing the treble winner title and UCL is the last title to get.
But, if I were to be honest, Inter Milan's experience could lead Inter to the title in the final.
You are right, odds depend on total bets if more bets are placed on PSG then the odds will be lower that's how the betting market works, but it must be remembered that even though many gamblers bet on PSG it doesn't mean PSG will win. Statistics also affect the odds because generally gamblers will check the statistics before placing a bet in this case PSG has more advantage but of course Inter Milan experience should not be ignored. I prefer to place bets during live for example, 20 minutes after the match starts from here we can see the situation of each team which team is more likely to win.