I'll admit, when I first read about pre-builts, my eyebrow did raise in suspicion. However, over time and in practice I've seen that its not really a big deal to me. Honestly, that's the only opinion I can have being a long-time player. The experience of a new player is so different now to when I was new, I can't fully appreciate how the early game is impacted by it.
All I can really surmise, with my out of touch experience, is that the experience of a new player who doesn't buy pre-built is mostly unchanged whether pre-built ships exist or not. So, agree to disagree.