However hardware startups that have to raise a lot of money before a Series A are... considerably riskier, no? If you're an established name in hardware or a hardware-adjacent field then you'll typically have less of an issue getting access to capital. You can strike some pretty amazing deals with vendors if the stars align.
But otherwise there's a considerable chance that you end up out of your depth, out of runway while pre-production units sit on a loading dock in China.
Pretty much everyone prefers investing in startups that require low capitalization at this point. Everyone has been bitten by this point. We've learned.
Not to say it isn't possible but I'm not going to unbalance my portfolio towards hardware startups unless that's somehow my play.