It's a good point your argument, but since we are currently validating transactions by 8sat/vbit there is no need for any block augmentation, and poor people can still run a node on a raspberry pi and validate their transactions.
On the other hand, the point of layer 2 solutions, is to also reduce the number of transactions at layer 1 to avoid/delay block augmentation.
The art lies in the balance between block size, miners' incentive and layer 2 solutions.