A used premium business laptop always makes more sense than Chromebook, regardless of how much you want to spend.
In the context of an 18 year old, looking to have a device to do word processing, email, web based applications, video conferencing throughout their time as a student, used premium business laptops are no more of a minefield than buying a brand new consumer grade laptop.
When the 12 month warranty runs out on a brand new consumer grade laptop runs out you have - in effect - a used laptop with relatively poor engineering. From a reliability and longevity point of view, you are then better off having an older premium laptop that was built with better engineering.
Bear in mind that most laptop failures are caused by "user error". Dropping them, leaving them in freezing car boots overnight, getting viruses onto them, spilling coffee over them etc etc etc. The warranty that comes with a new laptop does not cover user error failures. They are warranties, not comprehensive insurance policies.
And used premium business laptops are relatively reliable items.
Plus the items that are most likely to fail in a laptop: the hard drive and the battery are relatively cheap and easy to replace anyway.
You do get a lot of people on the internet with an agenda of selling or promoting new IT equipment. You can fall for their scaremongering marketing or you can reject it.
For all of the applications that you can run on a Chromebook, you can also do the same tasks lightning fast on any premium business laptop from HP, Dell and Lenovo made in the last 10 years that has an SSD hard drive.
You can get used business laptops for as cheap as free. By contacting IT departments of large organisations and asking if they have any old spare laptops you can have.
If you go on ebay or Facebook Marketplace, you can get some very nice used premium business laptops for under £250. Especially if you have some patience.
EG HP 830 G6
Windows laptops are more versatile than Chromebooks. And if you don't like Windows (Windows 10 is a relatively poor and annoying operating system) you can always install Linux.