I do like the thought of not having to diagnose any issues.
On my current setup, I had a memory and PSU issue at the same time, and it took weeks trying to figure it out since I did not have the components to swop out for testing. I finally broke down and asked Wootware to help since "most" of the system was bought through them. They had the parts to figure out the in a couple days.
It isn’t the same argument, your system wasn’t a pre-built, you simply booked it into Wootware’s workshop where they followed their own testing methodology and provided you with options in remedying your issue.
This is vastly different from combining different components into a single product, market it and sell it.
There are pre-built manufacturer PCs, ignoring OEM which is for this exact purpose, but Corsair, MSI, etc. all their pre-built systems are subject to their manufacturer terms. Just to have a quick look at the warranty of Corsair Systems, because they sell it as a single ‘manufactures’ system,
This warranty applies to all Corsair PC gaming systems: Corsair One and Vengeance PC. You can find warranties for other Corsair products on the Corsair Warranty page. How to Make a Warranty Claim ...
help.corsair.com
Overview
Corsair systems (e.g. Corsair One and Vengeance PC) come with a 2-year hardware warranty for the original purchaser, starting from the day of purchase from an authorized Corsair reseller.
Corsair offers a 90-day warranty for certified refurbished Corsair systems.
Corsair offers two choices for warranty service: advance replacements and standard replacements for its systems.
Depending on the model and age of your system, Corsair may choose whether the system will be repaired, or replaced with an equivalent model.
The warranty period may vary by specific system. You can find the warranty period on the product package, in the user documentation, or in this bulleted list. If you see different warranty periods for a product, the longest specified warranty period will apply.
This warranty is non-transferable, except where prohibited by applicable local law.
Which isn’t remotely the same as a seller taking components from different manufactures with different warranties and apply their warranty. It just doesn't work that way.
System builders like Steiger Dynamics in the USA have contractual relations with their ‘OEM’ partners, and because they are system builders they can only honour limited warranties. Usually, they have a limited 3-year warranty, and if liquid-cooled they have a limited 1-year warranty, and they provide shipping warranty options in addition to the standard limited warranties, but at a cost. As an OEM partner, they are legally allowed to do this, because the manufacturer's warranty doesn’t apply to their channel.