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This is not true. I don't know too much about Luke because I don't keep up with things to that level of detail with Bitcoin. So I looked this up.

SegWit was formulated by Bitcoin developer Pieter Wuille. Wuille is also the co-founder of Blockstream, a software company specializing in digital security for financial services.

Luke had discussed some of the issues before segwit came along that segwit would eventually solve and appears to have gotten involved again after Pieter kicked the discussion up and came up with a proposal. The most contribution Luke appears to have is that he suggested segwit be a soft fork.

The Intolerant Minority
While the BIP148 UASF seemed to have lost a lot of steam in favor of BIP149, not everyone had given up on this first UASF proposal completely.
Shaolinfry had proposed the concept under the assumption that it would be backed by an economic majority and thought it should be aborted before the flag day otherwise. But a group of users on the UASF Slack channel had a different idea. Some of them — including Bitcoin Core and Bitcoin Knots developer Luke Dashjr — were contemplating activating the soft fork regardless of what the rest of the Bitcoin ecosystem would do. Even if they were a minority, and even if they’d effectively spin themselves off into a new altcoin, they would move forward with the upgrade.

I attempted to find any mention that would explain why you are attributing him with such regard, but I cannot find anything that aligns. There is no "lateral mind" at play here.
Valuable skillet is debatable at best in my opinion, but even if that is the case his skillet is not rare.