This is an incorrect statement. To be blunt, you are lying.
Not every block increase results in a loss of decentralization.
Maybe not, but in general, bigger blocks = require more resources = centralizing the network. It's simply physics, ser.
You also need to consider cost of the resource (such as storage in $/TB or internet speed in $/GB) usually going down over time. Although waiting time for IBD (initial block download) probably only become worse, especially if block size limit is increased and people actually utilize it.