BIOS boot passwords were from another era with different needs and assumptions. In controlled access environments they can still have an impact if you have a proper chassis that has locks on it preventing removal of drives. Most normal people don't possess such business class chassis. The scenario was a business environment with security teams, other employees, supervisors and locks that while you could cut them with heavy equipment you'd be noticed doing so. In terms of preventing a team of thieves breaking in with power tools and stealing things true it never was meant to prevent that. It's more authorization and access control within an organization. The idea being perhaps the CEO's machine or a special machine for accessing sensitive devices would be physically locked and have such a password installed as another layer of security that couldn't be bypassed surreptitiously.

Additionally back in the day these BIOS boot passwords were paired with chassis intrusion alarms which went off every subsequent boot if the chassis was opened thanks to a sensor and the only way to clear that alarm was logging into the BIOS with an admin password.

Your gaming computer BIOS supports neither of these nor does your gaming motherboard have a chassis intrusion connector nor does your gaming case come with support for such a device.

But it was never about preventing data destruction even in these cases. It was more preventing access and making any such access more time consuming and likely to trip alarms to allow a response including evaluation of compromise by professionals.

If you want to protect your data make backups. If you want it well protected against determined parties who want to destroy all copies and/or thieves then locate a copy off-premises. If you can't do that at least locate a copy within a bolted down safe.