How come you think delegators take big risks? Their one and only risk is delegating tokens with a validator they would trust, not even to optimise gains, but to be sure the validator wont act maliciously. Other than that, thats it, validators dont really have any control or access on delegator’s tokens, only the delegator that own those tokens have.
At the same time validators need to harden their VPS to make sure people dont hack them, they have to make sure theyre online and signing blocks (which is not as trivial as it sounds), and they have to play the EPoS game each day.
All in all, im a delegator in many other networks, and while delegating is sometimes the easiest way (or the safest if youre not tech savvy), there is a big gap in risk for validators and delegators, not just with Harmony but with every other chains too.
On the matter of price rising and fees → if you check everyone else, no one is lowering their fees, in any network. You would ask why, since the price is higher so more gains in USD? Theres a few reasons, one is taht most of validators went through the bear market with the same fee settings, and a lot of them were not even having positive balances due to the low price back then. It only makes sense they can finally profit a bit from all their hard work. I 100% support that in Harmony and every other chain. You would probably feel the same if you ran your own validator, its easy to say things if you dont know how it looks when you have to actually pay attention and work each day. The second reason is, a lot of these validators dont really care about fiat value of the token, they just want more tokens. Granted this is a much smaller pool size but even these exist, and for them, the amount of tokens they earn now is the same, as back then.
Regarding lowering the barrier - yes we are doing that but in stages and are not rushing, to make sure the network is safe and secured. Once most of the seats are given out, its only on us external validators to make the network work, which can be risky at this point as any real issues would require all validators to restart the chain at the same time - not an easy feat.
That said, one of the proposals to lower the barrier is that EPoS upper bound suggestion (the other proposal here in the forum), which is about the only thing that can be done right now, due to the nature of EPoS. Those bounds are actually a security feature, so they cant be streched much unfortunately.