If I have to rely on another person to provide me with the block chain data, that is clearly the need for a trusted third party.
As long as there is no force barring you from firing up a node of your own, your criteria of access to trustlessness is satisfied. If you are unwilling to spend the rather negligible amount of money required to do so, that is not a fault of the system.
That's the exact opposite tune you guys are singing on user fees? Hypocrite much?