Well putting aside that the structure is wrong (
<body> is the tag that should contain all of the visible content on a web page,
<main> should be a child of that), no.
How could there possibly be any structure? How could it be styled, for example? How could you tell what is what? HTML is markup, it is a notation for attaching some information to blocks of text. Text on its own is just text.
So for example, this is small excerpt of the text that makes up the front page of a UK newspaper’s site, in text form:
The Guardian - Back to home
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News, sport and opinion from the Guardian's UK edition
Monday 18 May 2020
Live UK coronavirus: thousands expected to return to work as train capacity increases
This morning the Daily Telegraph has splashed on a story (paywall) saying that a study from Australia suggests that the risk of coronavirus spreading in schools is extremely low. Here’s an extract. Coronavirus does not spread widely in schools, according to a major study which is being considered by government advisers ... The study examined by the government advisers was conducted by Australia’s National Centre for Immunisation Research and Surveillance. It was cited by the country’s officials
Paul Whiteman, the general secretary of the NAHT union, which represents head teachers, told the Today programme this morning that teachers wanted more clarification on whether schools were centres of transmission. He said: Specifically around the transmission from children to adults, we’ve been told over the weekend - it’s been asserted by the government publicly over the weekend - that there isn’t the level of risk that we fear. However, we haven’t yet seen the scientific underpin of that. The
Oliver Dowden, the culture secretary, was doing the morning interview round on behalf of the government this morning. Here is a summary of what he’s been saying. Dowden said he did not expect Premier League football to resume until “probably mid-June at the earliest”. He said the Premier League would need to find a way for it to go ahead safely behind closed doors before the government gave approval. He said he was looking at increasing the number of free-to-air matches as this could be helpful
do you understand why this, on its own, is not useful?