Winning the UEFA Champions League against Inter Milan didn't seem to be a fluke as PSG's play at that time really made them deserve it.
With another win over Real Madrid in the FIFA Club World Cup semi-final, I agree with you that Paris Saint-Germain are now the strongest team. At least if they win again in the final against Chelsea, they will be the strongest team in the world for the 2024/2025 season. The 2025/2026 season will be challenged again.
Due to the poor display of Inter Milan in the UEFA Champions League finals, I thought a better side will beat PSG. But I would accept that I am wrong, they are the strongest team in Europe. Although they lost to Botafogo, I do not doubt that they can beat any team in Europe. From my observation, Chelsea will be a cheap side for PSG to beat because Real Madrid is better than the Blues in terms of quality. But I see a situation where Enzo Maresca will encourage his boys to get a goal and pack the bus. They might decide to play defensively and frustrate PSG.