Pages with a lot of text for related keywords

Is a site with a lot of text on the main page good for SEO top exposure?

Not necessarily.

If you are trying to rank it, it should match the intent or it will have a hard time ranking.

For example, you will have a hard time ranking 10k words page for a recipe keyword.

What matters is not the amount of the text but its quality. Key points:
- The text should contain relevant keywords but shouldn't be spammy.
- The text should be attractive to readers. Usually readers don't like long texts. Nobody reads them.
- The structure of the text also matters a lot. Keyword-rich headings, numbered / bulleted lists and short paragraphs are a must and contribute a lot to your Google ranking.

Also, the main page is not the ONLY page that attracts visitors to your site. Packing other pages with relevant keywords and high-quality text content is just as important!

Longer Content can drive Higher Search Rankings
Google doesn’t decide a page’s ranking by simply looking at its word count.
But text length is clearly correlated with better search rankings, the factors that actually help Google rank pages are merely made possible by long form Quality content.

bromanager said:

Is a site with a lot of text on the main page good for SEO top exposure?

Click to expand...

The optimal word count is 600 to 700 for SEO, and less than 300 are considered as thin content.
I suggest you consider the key factors for developing the content for your site rather than considering the count of words.