Yes.
Otherwise growth in Bitcoin is essentially capped and will move to other currencies. Speculators will also move on and the price will dip temporarily. This could possibly cause some spiraling issues... lower growth, lower price, higher fees, halved block reward. Bitcoin could lose their first mover and networking effect advantages in that type of situation.
and what is the problem to have many healthy with value blockchain systems? Why you think that one coin will rule them all in this new fintech era?
Nothing per say, but it lowers the value of BTC itself (or limits its potential value due to reduced velocity).