That depends.

If the engineer, doing the implementation is top-shelf, you can get very good results from a “flawed” process (in quotes, because it’s not actually “bad.” It’s just a process that depends on the engineer being that particular one).

Silicon Valley is obsessed with process over people, manifesting “magical thinking” that a “perfect” process eliminates the need for good people.

I have found the truth to be in-between. I worked for a company that had overwhelming Process, but that process depended on good people, so it hired top graduates, and invested huge amounts of money and time into training and retention.