While having Linux preinstalled is without doubt a good thing to make more people familiar with the ecosystem and soften the learning curve by eliminating the install process, note that this doesn't protect from any kind of spyware, branded crapware that pushes users into buying products or services, or simple telemetry. Users who know how to do a fresh Linux install should do that anyway before they put their personal data and files on the device. That would be good practice also with Windows preloaded laptops, where having a load of added garbage became the norm.