You realize we are talking about d&d 5e where the caster picks their own spells
The DM decides which spells on the list exist.
There are a range that don't at my tables.
If you've not read through the list and struck any you don't like, have you even DMd for a clever wizard before?
But I'm not entirely sure why you're reluctant
Because it's a showboaty exhibition match and picking a tailored list of spells for a specific encounter is boring - it's like unlocking all the choices in a video game. If you are certain they aren't strong, you do the work. Pick a range of encounters and build a range of wizards that fail at those encounters - with regularity. Flamestrike was trying to build an encounter based on the daily prepared list, which is absurd. Yours isn't absurd, but it is missing the point. It is just as easy to come up with an encounter a great many fighters would utterly fail at. What's more, they would fail at it with rough regularity across the level range, with the encounter appropriately scaled. Because there are some things they cannot easily do. The few things a wizard cannot easily do they can summon disposable monsters to do for them.
What makes playing a wizard enjoyable, and where martials truly fall down (outside of not being able to teleport and dominate) is this set of choices, that may be different for each character, and in the case of wizards, is different each day.
What people
want is a martial with a similarly large and varied bag of tricks (why can't a martial have a training montage where they prepare a bunch of leap and AoE sweep attacks?). Ideally, one that doesn't equate to just slapping a coat of caster paint on the fighter chassis. This complex martial doesn't exist in 5e right now.
In fact, I'd argue that the very fact people that want to set up such an exhibition match demand that
I provide the wizard's prepared list for them means they don't get it. If they can't assess the list and make reasonable choices, they don't get wizards in the first place and are arguing from a naive premise.