You could just clean your teeth earlier, and it doesn't take long with practice. I have a weird way of doing it where I thread the string across my mouth and do two teeth at once on opposite sides, it's pretty quick.
I can't blame people for not wanting to floss because for a long time I didn't either and I started and stopped so many times, but eventually I just had to suck it up and make it a daily habit. It's really important for your oral hygiene, I consider it on par with drinking enough water, getting enough sleep, eating nutritious food, exercise etc. You just have to do it whether you like it or not.