Yea someone else's computer is inherently trustodial.

I know Voltage put in a lot of work to have custodial deniability in the form of a professional SaaS offering, having LND keys made client-side, encrypted at rest etc... but none of that can solve for the fact that you're unencrypted wallet is running in their memory.

A VPS or Dedi with a reputable host is still the best option in many cases for Lightning, a company like Akamai hosts far more valuable workloads for enterprises... tens and maybe hundreds billions of dollars in value in aggregate... trillions if you consider losses from operational downtime for the major infrastructure they're a cog in (think Bulk Electric Systems).

Their reputation is worth far more than the sum of all Lightning nodes on their infrastructure.

Same can be said though of most hardware one might use to self-host, pretty much everything has a backdoor "management engine" so in both cases you're just reliant on those vendors/the NSA from opening Pandora's box.