That being said, I think there's a healthy ratio between speculative and dividend-yielding investments, and the market (especially the tech market) is nowhere near that healthy ratio.
You are hitting on a correct notion here though, which is that if the market totally went away - ie you held your shares but couldn't sell or buy - and you're an investor who owns .0001% of a megacorp and >50% of the shareholders won't vote to issue a dividend, then the security is worthless to you. Similarly, if the market does still exist but for whatever reason the company is "unfairly" valued extremely low by the market, then having dividends gives you an "anchor" to hold on to - at least your asset is giving you a 1% or a 3% or a [insert dividend yield here]% dividend while you wait for the market to value it fairly again - whereas without the dividend you've got nothing.