This is one of those issues that have different and conflicting angles.
It seems legitimate, since it's part of the premise of this RCE that skills have monetary value, that upon leaving it should be possible to liquidate one's assets without artificial obstacles. Having to "invest" a substantial sum by having to buy ESIs only to leave is indeed antagonizing.
The questionable, or at best controversial practice of chipping out to optimize one's competitive advantage in events is inevitably made more easy or more difficult along with the above.
If putting skills on the market becomes effortless, their market value will go the way of the dodo, or sweat. People's time has no intrinsic value and production is permanently ongoing. The market will be flooded. Sweat at least is consumable, with skills it would be only worse. Many skills already don't have any value above the ESI's markup.
If skills could simply be tt'ed, it would create a liablility on the company's balance sheet which has not been factored in before (I assume). It may or may not be feasible at all.
The presence of ESIs in the loot and the demand for them pushing up their markup is very welcome to offset losses. Removing them or offering them from TT would create complaints from the fraction that will miss them. (By the way, can they be looted from mining and crafting, too? Never occurred to me to ask this.)
How is MA supposed to resolve this to "benefit the greatest number of players"? I don't think they know the answer themselves yet. If you want to help, you need to be able to consider different angles than your own.