I don't see much issue here
Satoshi released with 33MB, he said it could be increased later, and Gav seems on the ball.
HD space is still going down in cost.
Storage is not a major bottleneck.
Bandwidth and latency are legitimate concerns from my reading of the material; though the current proposed change doesn't saturate either, depending on your personal situation.
One of the issues-at-hand concerns adopting strategies that can easily become centralization forces now, or in the future.
It is not something necessary for now in some peoples mind...
Given a serious situation, the network has in the past proven it's ability to fork quite quickly.
Further, even given a backlog in the mempool, users who include reasonable transaction fees with their transaction would be more likely to have their transaction included into a block. Meaning: The network would work fine.
It is a fact that storing and broadcasting your transactions on the chain is not "free".
You are enjoying the resources of the network of full-nodes.
...but they dont provide any solution for it...
There are a variety of solutions that have been proposed, although there is admitted lack of implementations. However, development resources would be more likely applied to a problem that was actually imminent.
...forking btc will sometimes leave btc to be worthless and that is their main consent about this .
Not true.
No Bitcoin will be "lost" -
With the exception of someone who receives an incoming transaction on the "losing" chain (that is not posted to the "winning" chain) and that output is then signed to a different address on the "winning" chain.