I disagree, there is a heavy slant towards SpaceX because SpaceX earned it. And taking maximum advantage of that makes a huge amount of sense. And it makes sense to talk about them more then anybody else.

But even fans of SpaceX agree that dual sourcing is important, it just so happens that the secondary bids are mostly not as good or inspiring. So they are talked about less.

Of the two rockets that resulted from the original COTS program, Falcon 9 and Antares, I think its pretty clear why when talking about those there is a heavy slant towards Falcon 9.

Had NASA not given SpaceX a chance for HR (as Bolten and others in the Obama administration wanted) the US would be reliant on Russia for ISS and that would be a literal disaster right now.

Success in the space industry is slanted towards SpaceX, and that why its the same on this sight.

It's because space ventures were complete ripoffs until spacex came along. SpaceX reinvigorated excitement for space in a lot of ways.

SpaceX is shaming all other effort (not an Elon fan but he is a game changer).

Not all, Rocket Lab are also doing great things. I’m just as excited about Neutron as I am about Starship. It will fill an important niche.

Rocket Lab has a tiny rocket and a nice space craft. That's all pretty neat but lets not go over board.

Neutron is less capable then Falcon 9 and likely lower launch rate as well. Its really not comparable to Starship at al.

I love RocketLab but they are not really playing in the same league as of yet and will not for a many years to come.