That is the stated Blocksrteam/small-blockian view: bitcoin should be used only for large-value settlements between institutions, like the Lightning network hubs -- not for ordinary e-purchases by ordinary citizens.
Still: why the Blocksrteam/small-blockian view states that Bitcoin should only be used by [large]-value things?
Well, you should ask them. They seem to believe that it would make bitcoin more attarctive or valuable. I myself don't see why.
What I can see is that Blockstream will profit (or thinks that it will profit) if e-commerce uses of bitcoin get pushed to off-chain solutions, like the Lightning network; because their business plan seems to be to provide software tools for such off-chain services (like the Liquid inter-exchange settlement tool that they just announced).
Perhaps the e-commerce traffic that will not fit in the Bitcoin blockchain will be picked up by
Viacoin, the altcoin
created by Core developer BTCDrak, which
has hired Peter Todd as CTO.