Because there are easier to gain alternatives? You just answered your own question.
Again, as we've been told by even Yoshi-P, the process you go through to get the relic for a certain ilevel is supposed to be comparable in effort to other means, namely those done through raiding. When the alternative was to get a 210 weapon through doing Gordias Savage, the process to get a 210 weapon was meant to be obtained as a time-based equivalent (whether they succeeded in making it comparable is a different question and not really relevant here) rather than a skill based equivalent.
To get a Lore 230 weapon, you have to clear the last boss of Midas once a week for seven weeks, plus spend 1000 lore. That's not a significant amount of effort, other than having to wait each week to clear Midas 4. The comparable relic weapon...9,000 esoterics, or do the weekly for Crystal Tower 5 times. It's not that far off in terms of effort.
To get a 210 weapon from Hismena. 490 esoterics, one run of Void Ark. To get the 210 relic weapon. 80 token (taking anywhere from 27,000 esos and 27,000 poetics, to 5 days per token of daily beast tribe quests after you've reached rank 3 or 6 days each from the new beast tribes, to running Gordias normal several hundred times) plus crafted items that can range from a reasonable 80k to 500K or more per item depending on your server.
One of these things is not like the other, one of these things just isn't the same.
In other words, it was made to match the alternative.
Now we have easier alternatives. Unless they are shifting away from that stated design, it should continue to be comparable as the non-raid alternative. Due to the 210 step still reflecting what they felt was the equivalent time-based difficulty compared to getting a 210 weapon at the time it was introduced, rather than than how it is now, it is no longer comparable with the alternatives...which is how it is supposed to be, again according to Yoshi-P's comments shortly after they introduced the weapon.