Similar thoughts as others...
I think a lot depends on where you are in the process, how established or visible you may already be, what your skill level is, etc. There are other opportunities. But there sure are a lot of them in the fall if it's your time to shine. If you clearly have the skill set for your target schools or level, you can probably take another route. If you aren't in high demand, or are a stretch player, fall can be a difference-maker.
I love football but I have seen far too many of my players' baseball careers derailed or ended suddenly on the football field. I have also have seen too many try to do both in the fall (football and fall showcase/scout ball). This, most often, has backfired.