The reasoning on the demand to stop vote counts was to delay until they could get legal observers in to validate the process, not a bid to stop the entire process altogether.

That's not true. Regrettably we have the nationally televised words of the president on the matter:

This is a fraud on the American public. This is an embarrassment to our country. We were getting ready to win this election. Frankly, we did win this election. We did win this election. So our goal now is to ensure the integrity for the good of this nation. This is a very big moment. This is a major fraud in our nation. We want the law to be used in a proper manner. So we’ll be going to the US Supreme Court. We want all voting to stop. We don’t want them to find any ballots at four o’clock in the morning and add them to the list. Okay? It’s a very sad moment. To me this is a very sad moment and we will win this. And as far as I’m concerned, we already have won it.

https://www.rev.com/blog/transcripts/donald-trump-2020-elect...

So, so often people only hear what they want to hear. From what we've witnessed over recent times, such thinking is so prevalent that it has to be a part of the human condition.

There were already Republican observers in NV (as per state law) and in PA, including Philadelphia. The argument lawyers are making in Philadelphia is basically incoherent. See the excerpts from the court transcript for PA case.

100% not true. Legal observers were in all places, and Trumps lawyers had to admit it in court when they said a ‘non-zero’ number were present. Most counting places even live streamed the count.

I think this is probably one of the most secure elections ever executed.

Of course, they had observers in place already, so this was a transparent effort to delay and create ambiguity.