Clarify NestJS error filters

platform-includes/getting-started-use/javascript.nestjs.mdx

@@ -49,6 +49,8 @@ export class YourCatchAllExceptionFilter implements ExceptionFilter {
 }
 ```
 
+By default, only unhandled exceptions that are not caught by an error filter are reported to Sentry.
+`HttpException`s (including [derivatives](https://docs.nestjs.com/exception-filters#built-in-http-exceptions)) are also not captured by default because they mostly act as control flow vehicles.
 
 {/* TODO(v9): Remove this note */}
 _Note that `@SentryExceptionCaptured()` was called `@WithSentry` in SDK versions `8.38.0` and prior._
@@ -73,12 +75,13 @@ import { SentryGlobalFilter } from "@sentry/nestjs/setup";
 })
 export class AppModule {}
 ```
+
 {/* TODO(v9): Remove this note. */}
 
 **Note:** If you have a NestJS + GraphQL application and you are using the `@sentry/nestjs` SDK version `8.38.0` or earlier, replace the `SentryGlobalFilter` with the `SentryGlobalGenericFilter`.
 In SDK versions `8.39.0` and above, the `SentryGlobalGenericFilter` is deprecated because the `SentryGlobalFilter` will handle GraphQL contexts automatically.
 
-By default, exceptions with status code 4xx are not sent to Sentry. If you still want to capture these exceptions, you can do so manually with `Sentry.captureException()`:
+If you have error filters for specific types of exceptions (for example `@Catch(HttpException)`, or any other `@Catch(...)` with arguments) and you want to capture errors caught by these filters, capture the errors in the `catch()` handler with `Sentry.captureException()`:
 
 ```javascript {9}
 import { ArgumentsHost, BadRequestException, Catch } from '@nestjs/common';