but buying a low quality bike and attempting to ride it may have a negative effect; you buy a dept store bike, you take it out, and realize the seat hurts. oh, well, I'm not used to that. then you realize it's hard to pedal up hills. once you push it up the hill and get back on for the downhill, why do these brakes squeak? they don't work well either. so now your clunky, noisy, heavy uncomfortable bike that you thought was 'good enough' gets relegated to the back of the garage, and all that's left is memories of how much you don't like riding a bicycle.
in all my years of selling and servicing bicycles, I NEVER had anyone say "I spent too much, I should have gotten the cheaper one", but there were PLENTY of people who wished they had gotten a better bike to begin with.