That is not the purpose of a commute, nor is a commute required to accomplish that goal. Think of all the other routines you maintain just fine without having to worry about getting fired from your job if you don't want to one day. If this was really the thing you wanted to do most, you'd find the motivation on your own just as you do with all the other things. If you need to be forced to do something, even if you derive some benefit, it's still not what you want. If I chase you with a machete, you may derive some benefit from being highly motivated to run, but that doesn't mean you should be thanking me.

Life is full of objectively bad things that nevertheless have a silver lining. It's good to look on the bright side when faced with problems you can not change, but it's important not to be fooled into thinking that these things aren't problems, especially when they are within your power to fix. That's how people wind up justifying all sorts of terrible situations like abusive relationships and terrible jobs.

Sure but I don't need a commute to enforce a routine for me. And yours is a very specific example, you bike to work, which means you 1. Like biking, and 2. Your workplace is close enough to your house to allow you to bike. I for example like to weight lift and I live quite far from work. I keep a routine for myself which a commute would not be conducive to.