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"Relying on the title attribute is currently discouraged as many user agents do not expose the attribute in an accessible manner as required by this specification (e.g. requiring a pointing device such as a mouse to cause a tooltip to appear, which excludes keyboard-only users and touch-only users, such as anyone with a modern phone or tablet)." make it clearer that the warning pertains to use of title for the visual display of text.
modified text add clause "for the visual display of text content" see commit https://github.com/w3c/html/commit/306f899290b9e97b08758c396a1dd72e78e8f100