that is because you have cpu power to spare or the engine can use your gpu.
for me a single animation playing uses 30% cpu, 60% with 2 (with image from below), 4 from the potion scene reach 95%, 5th makes the whole system barely usable and scene has more than 5. it was a very bad experience going past that.
try the potions scene with Gabriella and Venus, reach when mc finishes and roll back and play through animations while looking at cpu and gpu usage and you will see unusual high usage.
the videos being shorter help seeing that it plays 2 animations at the same time
View attachment 3381083
both the top and the bottom are animations and both are actively animating.
this also ran bad but not as bad as the next animations because they all are playing at once until it shows a static image. once they finished extracting pc was back to being fine at 3% cpu usage for a static image. all animations stopped playing.