the blocksize limit on bcash is currently 32 megabytes. If you look at the time required to validate a transaction, and you assume those blocks are full, you will quickly realize that "any computer is capable of validating bcash" is just simply not true.

Try it yourself, you'll see. If the blocks were full it would be impossible to sync a node because you would never catch up. The blocks will come faster than you can validate them.

The only reason it's possible to sync a node today on bcash is because those blocks are not actually 32 meg... they are all empty because no one actually uses bcash. Were they do, only a few nodes in massive datacenters would be able to validate the 32 megs of transactions per block.