Of course the cost of producing products that actually perform at the level they're advertised to perform is passed onto the consumer, regardless of regulation.
I guess it depends if everyone agrees on whether or not the product performs "as advertised" as not. If you have a defect that affects e.g. 1% of your users, but the government forces you to compensate 100% of your customers, that seems like an unnecessary cost.
For something like Meltdown/Spectre, the patches/workarounds reportedly barely affect some workloads, but cause drastic slowdowns for others. So already not everyone's affected to the same extent. Then you have computers with easily replaceable CPUs vs. stuff like phones and laptops which probably were only designed to work with a single CPU, and the manufacturer's already working on their next model and doesn't want to waste money building replacement parts for the previous one. At that point, maybe you have a complaint with e.g. Apple for selling you an iPhone that doesn't work as performed because they had to work around a security problem, and Apple might themselves go after Intel. The whole situation is a lot more complicated than "it should totally be covered under the warranty."
