They don't have to be evil people to be biased in their judgement.
I concur. But they don't HAVE to be biased in their judgement, just because the possibility exists that they might be. It's possible that the technical solution they propose is the BEST solution. I don't know that it is, I am just providing counterpoint to the relentless negativity toward Blockstream I see on here. They might be evil, or they might be RIGHT. You should at least consider it.
To compare: we have firefox, chrome and IE browsers on the HTTP. We have~15% of nodes running XT, a few running old obsolete versions of core and everyone else running core. That's a monopoly when a supermajority (or even a super-duper majority "consensus" need to implement a change. The biased core devs and greedy miners have veto power.
If you look in the debug.log file of your Bitcoin Core client, you will see lots of /version/ lines - these lines are the equivalent of the user-agent sent by browsers. There are many different implementations of the bitcoin client, in addition to the Satoshi client. Look for yourself.