In Pennsylvania Giuliani and Goldstein Both said they were not alleging fraud. In Arizona, there was no mention of fraud. Can you find any court proceedings where the attorneys claimed fraud?
That was at a hearing being conducted by the Pennsylvania House of Representatives. There were a lot of suits, I haven't read through them all. I think Lin Wood and Sidney Powell were alleging fraud. I didn't really look through their suits. Trump's team didn't go the fraud route because the difficulties involved in proving it. With having to coordinate efforts in 5 or 6 states in a very short amount of time, and no access to party resources, Trump's team had to make due with whatever support they could get from Republican parties at the state level, and the resources of the Trump campaign.
Lawyers develop their strategies to try to get the desired outcome with the approach that is most likely to achieve the outcome.
"In law it is a good policy to never plead what you need not, lest you oblige yourself to prove what you can not."
-Abraham Lincoln
For the most part Trump's team went after the electors clause issues. Outside the courts, they were trying to force signature audits, especially in Georgia, when they shouldn't have had to force them, and, as far as I know, some counties in Georgia were never audited. Signature challenges generally disqualify enough ballots that it could have actually flipped Georgia back to Trump. The problem in Georgia is that the Democratic party sued the Secretary of State to get the signature challenge rules changed, circumventing the State Legislature, which is where the Electors Clause comes in.
Bear in mind, signature challenges were how Obama disqualified his primary opponents for Illinois State Senate.