would this be a bad idea?

Well that always depends on how well you plan for/ mitigate risk. You need a plan for preventing risk and a plan for dealing with something after it's happened. Falling and drowning are the two leading causes of death in Glacier, so if you aren't prepared to deal with those at a bare minimum, you're pretty much asking the wilderness to turn you into a statistic.

It could be something as simple as getting friction blisters on your feet 2 days into the hike, and the return trip takes you twice as long. What if you decide to hike during the night to make up lost time. Are you prepared for that? Maybe you spill half your water; then what? Maybe you poke a big hole in your tent and it's supposed to rain all night. Are you going to repair your tent in the field? Maybe you're forced to hike through dead bushes and you get a sliver in your eye. Got the supplies to clean your eye? Does that rely on you having drinking water? Etc etc.

Hiking alone isn't inherently more sketchy than hiking with another person. If anything, group hikes lull people into being complacent because they think if they do something stupid that they can always rely on someone else to be there to save them instead of knowing how to save themselves.