It's not a bad opinion and you have a reason to say it, for me the main strength of Real Sociedad is in defense, maybe in the group stage Real Sociedad can rely on defensive games to continue to collect points but in round 16 the elimination system will be applied this means that it is not enough to rely on defense each team must collaborate between attacks and defense so who is better? PSG who relies on attacks or Real Sociedad that rely on defense we will see it in the upcoming match and if you ask me then I prefer a club that relies on attacks. In my opinion, PSG will qualify from round 16 and Real Sociedad must come out earlier, I might be wrong but this is a prediction.
No opponent is weak when entering the Knockout stage. Moreover, it's crucial to remember that Real Sociedad is competing at the top of La Liga. This is an opponent that PSG must absolutely respect and prepare thoroughly for the upcoming match, regardless of their chosen playing style. A strong team is one that knows its strengths, be it in attack or defense, and Real Sociedad is such a team. Although currently considered the lowest-rated team in the Round of 16, I believe they will surprise other giants, specifically PSG in the upcoming Round of 16 if they can continue to maintain their current form. Higher-rated teams often face more pressure in decisive Knockout matches.