In your opinion maybe. But others may disagree - if fees are too much when moving bitcoin, then the rational economic thing to do is to switch to an alt with a lower fee. It is the price mechanism at work. There is no monopoly in cryptocurrency, that is the beauty, instead there is plenty of choice. If there is a failure point in bitcoin, the market will simply move to the next best alt.
If you want to be a cheap person and need fees that are < 5 cents, sure. Otherwise, no. Besides, you probably pay a fee at converting so you lose out most of the benefit anyways. Altcoins are not even worth my time as a means of transfer. The only thing that could be useful are the rare features such as found in Monero (some of the anonymity).
Maybe Bitcoin sidechains could work much better than highly volatile altcoins.
Yes, they are going to be the right 'option' and you can practically say 'bye' to these altcoins. An interesting example of that would be Rootstock.
Normally the fee of public unconfirmed transactions is just few Bitcoins, but sometimes someone can mistakely send 0.0001 BTC wih 100 BTC fee, or with spam attack the fees of public unconfirmed transactions might go higher.
Again, someone needed to confirm whether this actually happened as blockchain.info can show the wrong information at times. I haven't noticed the thread in time, else I would have verified it on other explorers.