It does not need to be a voter fraud in a primitive case. For example, changing voting rules for whatever reason by bodies that are not authorized to do it is also disputable in courts. This what Trump team is trying to do. We all have observed how results changed in Pennsylvania when they started counting ballots received by mail in days after election. Some of these ballots were received after polls were closed and counted on the basis that they were mailed before the election day. After they were counted the mailing envelopes were destroyed thus mailing date can’t be verified at the recount. There are some similar concerns about other procedures.The NY Times does not get to decide the election. The Courts will. There will either be evidence of voter fraud to support the lawsuits or not. That process needs to play out.
The bottom line is that in some states the difference is probably below the “white noise”. Anybody who believes that votes can be counted with absolute accuracy (“every vote counts”) is delusional and has no understanding of the physical reality. Without a sufficient margin it is akin to tossing a coin.