Barely making it through is more fun than casually strolling through
As a DM I usually make things to utilize my parties resources to the fullest so when they decide to hoard abilities and not use them it usually makes things harder than it has to be
Today my party will be encountering a creature with an aura of silence (like the spell but a bigger area) which will basically put half the party on survival duty (managing the layout of the encounter) while the other half are on combat duty (as they're the only ones able to do damage)
It's going to be rough but some encounters I make primarily focus on the abilities of some party members over others and it shifts about for who that is
Hell a few weeks ago I had an encounter where no one was very effective and it was super intense where a party member jumped in front of another shielding them and keeping them alive for the remainder of the fight even though they knew it would probably put them into death saves (didn't by 2hp)
Basically what I'm saying is that sometimes the best tool for a power fantasy is having powerless moments, it helps to make the world more alive and encourages out of the box thinking