"The Meltdown and Spectre design flaws are a result of chip makers prioritizing speed over security".
Which is just another typical instance of modern business prioritizing marketing over quality.
More a case of business listening to their customers. Everybody wants faster CPUs, almost nobody(*) screams "make my CPU slower and more secure".
(*) Maybe a few security types did, but they're such a small minority they rarely get heard until it's too late.